That scene in turn was lifted pretty much directly from Sorcery! 2, where in one scene, a more powerful wizard asks you to test his magic experiment by casting DOPH to talk to animals, while he casts TEL to read your mind. It causes your mind to degrade into that of a dog, and he plays fetch with you and you get a bad end of "You became a wizard's pet"

Of course, there's practically no tf description in it, but it turned me on when I played it on my phone on the train, so I wrote that entire CYOA to flesh out that scene. And drew this too!